Regulator for use in charging accumulator-cells for motor-car ligthing and starting and for similar purposes.



- W. H. SCOTT. REGULATOR FOR USE IN CHARGING ACCUMULATOR CELLS FOR MOTORCAR LIGHTING AND STARTING AND FOR SIMILAR PURPOSES.

APPLICATION FILEU JUNE 22, HH-

1. T; 9 1 i, 1 39. Patented July 11 1916.

I use misuse J[ LIIIII- //VVENTO/Y NIT/VESSE'S W/LL/HM HHKm/vq S TUNITED srans WILLIAM HARDING- SCQ'I'T, 0F NU LATOR FOR USE IN CHARGINGACCUMULATOR UELLS FOR MOTDR-CAB LI 'ICH, ENGLANIP.

AND STARTING AND 503 SIMILAR PURPOSES.

. Application filed June 22, 191 1.

T 0 all whom it may concern Be it known that I, \VILLIAM HARDING Scor'r,a subject of the King of Great Britain, residing at Gothic Works,Norwich, England, have invented new and useful In]- provements inRegulators for Use in Charging Accumulator-tells for iotor-Car Lightingand Starting and for Emmilar Purposes, of which the. following is aspecification.

My invention relates to the known re ulators in which in the shuntcircuit 0" a generator used for charging a secondary battery. a numberof carbon blocks, or disks, are employed, the said blocks, or disks,being normally pressed together with a moderate pressure applied by aweight acting in opposition to which is an electro-magnet, acting uponan armatureas to tend to relieve the carbon blocks, or disks, from thepressure exercised upon them by the aforesaid weight. In such regulatorsit has been proposed to usea fixed resistance across the ends of theseries of carbon blocks, or disks, with the object of not allowing allthe current to pass through the carbon blocks, or disks, while leavingthem capable of maintaining the voltage. I make no general claim toregulators constructed on the foreg'oing principle. 4

According to my invention I make the aforesaid armature of theelectro-magnet a lever, which turns on a knife-edge fulcrum 'which formspart of the magnetic circuit,

the aforesaid short ranged spring, or the equivalent, being arranged toact on'one arm of the said lever to exert pressure on the carbon blocks,or disks, the electro-n'iagnet,

' when energized, operating on the other arm of the said lever inopposition to the said spring.

Figure 1 of the accompanying drawings represents, a device constructedin accordance with this invention, and Fig. 2 is a diagram illustratingits application to the shunt circuit of a generator.

In the shunt circuit A, of the generator B, are the carbon blocks, ordisks, C, inclosed in an insulating tube D mounted in carriers E whichcan be insulated from the base plate F. The said carbon blocks, ordisks, are normally pressed together with a moder- Speciflcation ofLetters Patent.

Serial No. 846,58ti.

ate pressure by means of the short-range spring G, acting in oppositionto which the electro-magnet H, the winding of whic. is illustrated asbeing a series Winding, any other suitable Winding may he ployed. \Vhenthe conditions are such the resistance through the re ulator is to inceased the said magnet Will he energiz so as to act upon the armature Iagainst the to exert the required pressure onthe carbon blocks, ordisks, C'while the electromagnet I when energized. acts on the other armi or the said armature in opposition to the said spring (i. The pressureof the spring G is conveyed to the carbon blocks, or disks, 0 by asliding stem K and at the other end of the series of blocks, or disks, 0is a screw L by which the minimum resistance can be regulated and itsdegree indicated by a.

pointer l.

By inclosing the carbon blocks, or disks, in an insulating containerwhich is airtight, or practically so, the rate of burning away whenarcing takes place between the carbon blocks, or disks, is reduced, theresistance d, further reducing this I arcing.

What I claim is 1. In regulators of the character described, a series ofcarbon blocks, an armature lever having an operative bearing on saidblocks, a spring acting in one direction upon said lever and anelectromagnet acting in the opposite direction thereon, and an armaturesupporting arm having a knife edge support for the armature in themagnetic circuit.

2. In regulators of the character described, a series of carbon blocks,an arma- Cit tare lever having an operative bearing on said blocks, aspring acting in one direction upon said lever and an electromagnetacting in the opposite direction thereon, said electro-mugnet having abranch arm in the magnetic circuit and provided with a knife edgeforming a support for the armature, sub stantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM HARD] N( SCOTT.

\Vitnesses RICHARD Homncs, WILLIAM FAY.

